7Huber S,Delorme S,Knopp MV,et al.Breast Tumor:Computerassisted quantitative assessment with color Doppler US.Radiology,1994,192:797 ～801.
8Raza S,Baum JK.Solid breast lesions:evaluation with power Doppler US.Radiology,1997,203:164 ～ 168.
9Ophir J, Cespedes EI, Ponnekanti H, et al. Elastography: a quantitative method for imaging the elasticity of biological tissues[J]. Ultrason Imaging,1991,13(2):111-134.
10Krouskop TA, Wheeler TM, Kallel F, et al. Elastic moduli of breast and prostate tissues under compression[J]. Ultrason Imaging,1998,20(4):260-274.
